CN220791962U - Electric push rod with pneumatic assistance - Google Patents
Electric push rod with pneumatic assistance Download PDFInfo
- Publication number
- CN220791962U CN220791962U CN202322569164.3U CN202322569164U CN220791962U CN 220791962 U CN220791962 U CN 220791962U CN 202322569164 U CN202322569164 U CN 202322569164U CN 220791962 U CN220791962 U CN 220791962U
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- air pressure
- pressure cavity
- air
- push rod
- electric push
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- 238000007789 sealing Methods 0.000 claims description 29
- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 10
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000004146 energy storage Methods 0.000 abstract description 4
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 20
- 230000033001 locomotion Effects 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to the technical field of electric push rods, and discloses an electric push rod with pneumatic assistance, which comprises a shell, wherein an air pressure cavity is arranged in the shell in a closed manner, a lead screw and a motor for driving the lead screw to rotate are arranged on the shell, a telescopic pipe is sleeved on the lead screw, an inflation valve for compressed air to enter the air pressure cavity and an overflow valve for compressed air to overflow the air pressure cavity are arranged on the shell, and the overflow valve is communicated with the inflation valve through the air pressure cavity; compressed gas is injected into the air pressure cavity through the air charging valve, the air spring can assist the telescopic pipe to increase the thrust, and compared with the traditional electric push rod, the electric push rod has the energy storage effect and can save energy consumption; when the telescopic pipe is recovered in the air pressure cavity, the effect of buffering can be achieved through the recovery process of compressed air to the telescopic pipe, and therefore the bearing capacity of the electric putter is improved under the condition that the structural size of the electric putter is not changed, the service life of the electric putter is prolonged, and the manufacturing cost is reduced.
Description
Technical Field
The utility model relates to the technical field of electric push rods, in particular to an electric push rod with pneumatic assistance.
Background
The electric push rod is a general auxiliary driving device and is widely used in various industries, and the electric push rod is an electric driving device for converting the rotation motion of a motor into the linear reciprocating motion of the push rod, and can be used as an execution machine to realize remote control, centralized control or automatic control.
Under the condition that unidirectional gravity does work, in the process of pushing an object to do movement against gravity by using the electric push rod, only the upward pushing process does work, and the pushing force can be reduced along with the extension of the telescopic push rod, in the condition, the torque of a motor required for driving the screw rod to rotate is greatly increased, and once the torque exceeds the torque calibrated by the motor, the motor is burnt out, so that the service life of the electric push rod is directly influenced. If the heavy load is increased, a screw rod with larger bearing capacity, a telescopic push rod and a motor with larger torque are required to be started so as to ensure safe bearing. Therefore, simply and mechanically improving the main bearing capacity of the electric push rod, namely increasing the diameter of the central supporting device and the torque of the driving motor, will tend to greatly improve the manufacturing cost of the electric push rod.
Disclosure of Invention
The utility model aims to provide an electric push rod with pneumatic assistance, which aims to solve the problems in the prior art, improve the bearing capacity of the electric push rod without changing the structural size of the electric push rod, prolong the service life of the electric push rod and reduce the manufacturing cost.
The utility model is realized in such a way, the electric push rod with pneumatic assistance comprises a shell, wherein an air pressure cavity is arranged in the shell in a closed way, a screw rod and a motor for driving the screw rod to rotate are arranged on the shell, the motor is in transmission connection with the screw rod through a gear mechanism, the screw rod is positioned in the air pressure cavity, a telescopic pipe is sleeved on the screw rod, the inner end of the telescopic pipe is positioned in the air pressure cavity, the outer end of the telescopic pipe is exposed out of the shell, an inflation valve for compressed air to enter the air pressure cavity and an overflow valve for compressed air to overflow the air pressure cavity are arranged on the shell, and the overflow valve is communicated with the inflation valve through the air pressure cavity;
when the compressed gas is injected into the air charging valve towards the air pressure cavity until the pressure in the air pressure cavity is higher than the set value of the atmospheric pressure, the compressed gas in the air pressure cavity forms an air spring which is pneumatically assisted to push the telescopic pipe to move outwards.
Further, the shell comprises a transmission case for the gear mechanism to link with the motor and the screw rod to be meshed, an outer tube for the telescopic tube to stretch out and draw back is arranged on the transmission case, and the inner cavity of the transmission case is communicated with the inner cavity of the outer tube to form the air pressure cavity.
Further, the transmission case is in sealing connection with the inner end of the outer tube through a first sealing ring, the inner side wall of the outer end of the outer tube is in sliding fit with the periphery of the telescopic tube, the inflation valve is located on the transmission case, and the overflow valve is located on the outer tube.
Further, the screw rod is connected with the air pressure cavity through a bearing retainer ring, and a flow hole for compressed air to circulate is formed in the bearing retainer ring.
Further, the charging valve is communicated with the overflow valve through a flow hole.
Further, the telescopic pipe is internally provided with a pressurizing air cavity for elastically pressurizing compressed air, the telescopic pipe is provided with a pressurizing hole, and the pressurizing air cavity is communicated with the flow hole through the pressurizing hole.
Further, a sealing end cover for sealing the air pressure cavity is arranged at the outer end of the outer tube, and the inner side wall of the sealing end cover is in sealing arrangement with the periphery of the telescopic tube.
Further, the inside wall of the sealing end cover is provided with a first check ring, an elastically deformed main bearing sealing ring, a second check ring and an elastically deformed secondary bearing sealing ring at intervals from inside to outside in sequence, and the inside wall of the first check ring, the inside wall of the main bearing sealing ring, the inside wall of the second check ring and the inside wall of the secondary bearing sealing ring are respectively movably abutted to the periphery of the telescopic pipe.
Furthermore, the inner side wall of the main bearing sealing ring is provided with two convex rings extending towards the telescopic pipe, an elastic deformation area is formed between the two convex rings at intervals, and the two sides of the main bearing sealing ring are respectively provided with an inward concave inner groove.
Further, the inner side wall of the secondary bearing sealing ring is provided with a pressing ring protruding towards the telescopic pipe and a friction section extending outwards in an inclined mode, the friction section is abutted from inside to outside towards the periphery of the telescopic pipe, the pressing ring is abutted to the periphery of the telescopic pipe, and a blocking area is formed between the pressing ring and the friction section at intervals.
Compared with the prior art ， According to the electric push rod with pneumatic assistance, the compressed gas is injected into the pneumatic cavity through the charging valve, the air spring can assist the telescopic pipe to increase the thrust, and compared with a traditional electric push rod, the electric push rod with pneumatic assistance has the energy storage effect, and energy consumption can be saved; when the telescopic pipe is recovered in the air pressure cavity, the effect of buffering can be achieved through the recovery process of compressed air to the telescopic pipe, and therefore the bearing capacity of the electric putter is improved under the condition that the structural size of the electric putter is not changed, the service life of the electric putter is prolonged, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic perspective view of an electric putter with pneumatic assistance provided by the present utility model;
FIG. 2 is a schematic view of a cut-away structure of an electric putter with pneumatic assistance provided by the present utility model;
FIG. 3 is a schematic perspective cutaway view of a primary load-bearing seal ring provided by the present utility model;
fig. 4 is a schematic perspective cutaway view of a secondary load-bearing seal ring provided by the utility model.
In the figure: the device comprises a casing 100, an air pressure cavity 200, a lead screw 300, a motor 400, a gear mechanism 500, a telescopic pipe 600, an inflation valve 700, an overflow valve 800, a sealing end cover 900, a transmission case 101, an outer pipe 102, a bearing retainer 301, a flow hole 302, a pressurizing air cavity 601, a pressurizing hole 602, a first retainer ring 901, a main bearing seal ring 902, a second retainer ring 903, a secondary bearing seal ring 904, a convex ring 905, an inner groove 906, a pressure resisting ring 907 and a friction section 908.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The implementation of the present utility model will be described in detail below with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limiting the present utility model, and specific meanings of the terms described above may be understood by those of ordinary skill in the art according to specific circumstances.
Referring to fig. 1-4, a preferred embodiment of the present utility model is provided.
The electric push rod with pneumatic assistance comprises a machine shell 100, wherein an air pressure cavity 200 is arranged in the machine shell 100 in a closed manner, a lead screw 300 and a motor 400 for driving the lead screw 300 to rotate are arranged on the machine shell 100, the motor 400 is in transmission connection with the lead screw 300 through a gear mechanism 500, the lead screw 300 is positioned in the air pressure cavity 200, a telescopic pipe 600 is sleeved on the lead screw 300, the inner end of the telescopic pipe 600 is positioned in the air pressure cavity 200, the outer end of the telescopic pipe 600 is exposed out of the machine shell 100, an inflation valve 700 for compressed air to enter the air pressure cavity 200 and an overflow valve 800 for compressed air to overflow the air pressure cavity 200 are arranged on the machine shell 100, and the overflow valve 800 is communicated with the inflation valve 700 through the air pressure cavity 200;
when compressed gas is injected into the air pressure chamber 200 toward the air charging valve 700 until the pressure in the air pressure chamber 200 is higher than the set value of the atmospheric pressure, the compressed gas in the air pressure chamber 200 forms an air spring which pneumatically assists to push the extension tube 600 to move outwards.
The electric push rod with pneumatic assistance provided by the above is characterized in that compressed gas is injected into the pneumatic cavity 200 through the charging valve 700, the gas spring can assist the extension pipe 600 to increase the thrust, and compared with the traditional electric push rod, the electric push rod with pneumatic assistance has the energy storage effect, and the energy consumption can be saved; when the telescopic pipe 600 is recovered in the air pressure cavity 200, the effect of buffering can be achieved through the recovery process of compressed air to the telescopic pipe 600, so that the bearing capacity of the electric push rod is improved under the condition that the structural size of the electric push rod is not changed, the service life of the electric push rod is prolonged, and the manufacturing cost is reduced.
When the pressure in the pneumatic chamber 200 exceeds a set value, the pressure may escape through the relief valve 800.
The electric push rod has the characteristics of the traditional electric push rod and the characteristics of the traditional gas spring, which are equivalent to the parallel connection of the traditional electric push rod and the traditional gas spring, the gas spring can assist the telescopic pipe 600 to bear the thrust, and has the energy storage effect, and the thrust of the gas spring can be reduced along with the extension of the telescopic pipe 600; the gas spring in the electric push rod mainly plays a role of balancing weight, the thrust curve of the traditional gas spring is approximately linear, and when the thrust requirement of the electric push rod is approximately a sine function, the thrust requirement and the sine function cannot be completely offset, so that the motor 400 is required to provide power to compensate, the thrust is provided when the thrust of the gas spring is insufficient, the tension is provided when the thrust of the gas spring is excessive, and the damage such as heating and friction of a system is offset through acting of the motor 400, so that the system can run for a long time.
The compressed gas is preferably nitrogen.
The casing 100 comprises a transmission case 101 for the gear mechanism 500 to link the motor 400 and the screw 300, an outer tube 102 for the telescopic tube 600 to stretch and retract is arranged on the transmission case 101, and an inner cavity of the transmission case 101 is communicated with an inner cavity of the outer tube 102 to form an air pressure cavity 200.
The transmission case 101 is in sealing connection with the inner end of the outer tube 102 through a first sealing ring, the inner side wall of the outer end of the outer tube 102 is in sliding fit with the periphery of the telescopic tube 600, the inflation valve 700 is positioned on the transmission case 101, and the overflow valve 800 is positioned on the outer tube 102; in this way, the mounting tightness between the transmission case 101 and the outer tube 102 can be improved, thereby improving the tightness to the air pressure chamber 200.
The screw rod 300 is connected with the air pressure cavity 200 through a bearing retainer ring 301, and a flow hole 302 for compressed air to circulate is formed in the bearing retainer ring 301; the charging valve 700 is communicated with the overflow valve 800 through the flow hole 302; in this way, the air pressure cavity 200 can be communicated with the pressurized air cavity 601, the pressure of the air pressure cavity 200 and the pressurized air cavity 601 can be ensured to be the same, the volume of the pressurized air cavity 601 is increased, and the attenuation condition of the compressed air to the thrust of the telescopic pipe 600 along with the extension of the telescopic pipe 600 can be relieved.
The telescopic pipe 600 is provided with a pressurizing air cavity 601 for elastically pressurizing compressed gas, the telescopic pipe 600 is provided with a pressurizing hole 602, and the pressurizing air cavity 601 is communicated with the flow hole 302 through the pressurizing hole 602; in this way, during the outward movement of the extension tube 600, the compressed gas is continuously pressurized into the pressurizing air cavity 601 through the pressurizing hole 602, so as to assist in pushing the extension tube 600 to move outwards, and reduce the thrust attenuation of the electric push rod.
A sealing end cover 900 for sealing the air pressure cavity 200 is arranged at the outer end of the outer tube 102, and the inner side wall of the sealing end cover 900 is in sealing arrangement with the outer periphery of the telescopic tube 600; in this way, the compressed gas in the gas pressure chamber 200 does not leak when the bellows 600 moves in the outer tube 102.
In this embodiment, a first retainer ring 901, an elastically deformed main bearing seal ring 902, a second retainer ring 903, and an elastically deformed sub bearing seal ring 904 are sequentially disposed on the inner side wall of the seal end cap 900 at intervals from inside to outside, and the inner side wall of the first retainer ring 901, the inner side wall of the main bearing seal ring 902, the inner side wall of the second retainer ring 903, and the inner side wall of the sub bearing seal ring 904 are respectively movably abutted against the outer periphery of the telescopic tube 600.
The seal end cap 900 increases the sealing arrangement of the air pressure chamber 200 within the enclosure 100 by the multiple sealing arrangement of the first retainer ring 901 and the primary, second and secondary load bearing seal rings 902, 903, 904.
In this embodiment, the inner side wall of the main bearing seal ring 902 has two protruding rings 905 extending toward the extension tube 600, and the two protruding rings 905 are separated to form an elastically deformed deformation region, and the two sides of the main bearing seal ring 902 have inner grooves 906 recessed inwards.
The convex ring 905 of the main bearing seal ring 902 can be in movable contact with the telescopic tube 600 and elastically deform, so that the main bearing seal ring 902 and the telescopic tube 600 can be tightly attached, wherein the inner groove 906 can be used for increasing the elastic deformation of the main bearing seal ring 902, so that the main bearing seal ring 902 is fully contacted with a connecting object.
In this embodiment, the inner side wall of the secondary bearing seal ring 904 has a pressing ring 907 protruding toward the telescopic tube 600 and a friction section 908 extending obliquely outward, the friction section 908 is pressed against the outer periphery of the telescopic tube 600 from inside to outside, the pressing ring 907 is pressed against the outer periphery of the telescopic tube 600, and a separation area is formed between the pressing ring 907 and the friction section 908.
When the telescopic tube 600 is retracted, the friction section 908 and the pressing ring 907 of the secondary bearing sealing ring 904 play a role in scraping dust, sundries and oil water on the surface of the telescopic tube 600 and preventing the sealing effect of the air pressure cavity 200 from being affected.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The electric push rod with the pneumatic assistance is characterized by comprising a shell, wherein an air pressure cavity is arranged in the shell in a closed manner, a screw rod and a motor for driving the screw rod to rotate are arranged on the shell, the motor is in transmission connection with the screw rod through a gear mechanism, the screw rod is positioned in the air pressure cavity, a telescopic pipe is sleeved on the screw rod, the inner end of the telescopic pipe is positioned in the air pressure cavity, the outer end of the telescopic pipe is exposed out of the shell, an inflation valve for compressed air to enter the air pressure cavity and an overflow valve for compressed air to overflow the air pressure cavity are arranged on the shell, and the overflow valve is communicated with the inflation valve through the air pressure cavity;
when the compressed gas is injected into the air charging valve towards the air pressure cavity until the pressure in the air pressure cavity is higher than the set value of the atmospheric pressure, the compressed gas in the air pressure cavity forms an air spring which is pneumatically assisted to push the telescopic pipe to move outwards.
2. The electric push rod with pneumatic assistance as claimed in claim 1, wherein the casing comprises a transmission case for meshing the gear mechanism linkage motor with the screw rod, an outer tube for telescoping the telescopic tube is arranged on the transmission case, and an inner cavity of the transmission case is communicated with an inner cavity of the outer tube to form the pneumatic cavity.
3. The electric push rod with pneumatic assistance as set forth in claim 2, wherein the transmission case is in sealing connection with the inner end of the outer tube through a first sealing ring, the inner side wall of the outer end of the outer tube is in sliding fit with the outer periphery of the telescopic tube, the inflation valve is located on the transmission case, and the overflow valve is located on the outer tube.
4. The electric push rod with pneumatic assistance according to claim 3, wherein the screw rod is connected with the pneumatic cavity through a bearing retainer ring, and a flow hole for compressed gas to circulate is formed in the bearing retainer ring.
5. The electric putter with pneumatic assistance as set forth in claim 4, wherein said charge valve communicates with said relief valve through a flow orifice.
6. The electric putter with pneumatic assistance as set forth in claim 5, wherein said bellows has a pressurizing air chamber for the elastic pressurization of the compressed air, said bellows being provided with a pressurizing hole, said pressurizing air chamber being in communication with the flow hole through the pressurizing hole.
7. The electric putter with pneumatic assist as set forth in any one of claims 3 to 6, wherein a sealing end cap closing the pneumatic chamber is installed on the outer end of the outer tube, and an inner side wall of the sealing end cap is hermetically disposed with the outer circumference of the telescopic tube.
8. The electric putter with pneumatic assistance as set forth in claim 7, wherein the inner side wall of the end cap is provided with a first retainer ring, an elastically deformed main bearing seal ring, a second retainer ring, and an elastically deformed secondary bearing seal ring at intervals from inside to outside, and the inner side wall of the first retainer ring, the inner side wall of the main bearing seal ring, the inner side wall of the second retainer ring, and the inner side wall of the secondary bearing seal ring are respectively movably abutted against the outer periphery of the telescopic tube.
9. The electric putter with pneumatic assistance as set forth in claim 8, wherein the inner side wall of the main bearing seal ring has two convex rings extending toward the telescopic tube, a space between the two convex rings forms a deformation area of elastic deformation, and two sides of the main bearing seal ring have inner grooves recessed inward.
10. The electric putter with pneumatic assistance as set forth in claim 9, wherein the secondary bearing seal ring has a pressing ring protruding toward the bellows and a friction section extending obliquely outward on an inner side wall thereof, the friction section being abutted from inside to outside toward an outer periphery of the bellows, the pressing ring being abutted on the outer periphery of the bellows, a space between the pressing ring and the friction section forming a blocking area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322569164.3U CN220791962U (en) | 2023-09-21 | 2023-09-21 | Electric push rod with pneumatic assistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322569164.3U CN220791962U (en) | 2023-09-21 | 2023-09-21 | Electric push rod with pneumatic assistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220791962U true CN220791962U (en) | 2024-04-16 |
Family
ID=90657369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322569164.3U Active CN220791962U (en) | 2023-09-21 | 2023-09-21 | Electric push rod with pneumatic assistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220791962U (en) |
-
2023
- 2023-09-21 CN CN202322569164.3U patent/CN220791962U/en active Active
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